Centrifugal paint mixing or smoothing machine



D. W. BLACK.

CENTRIFUGAL PAINTMI XING (in SMOOTHIN'G MACHINE. APPLICA'HON FILED APR. I -511922- 1336592, Patented Nov. 28, 1922.

2 SHEETS-SHEET III Event J7 207M716? 3y (fwd is day.

D. W. BLACK. AL PAINT MIXING 0R SMOOTHWG MACHINE.

APPLICATION FILED 11.45.1922.

wmnrue Patented Nov. 28, 1922.

2 SHEETSSHEET 2.

Patented Nov. 28, 1922.

UNITED STATES DONALD W. BLACK, OF SOMERVILLE, MASSACHUSETTS.

GENTRIFUGAL PAINT llllIXlING OR SMOOTHING MACHINE.

Application filed April 15, 1922. Serial No. 553,237.

To all whom it may concern:

Be it known that I, Donate W. BLACK, a. citizen of the United States of America, and a resident of Somerville, in the county of Middlesex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Centrifugal Paint Mixinfi or Smoothing Machines, of which the f0 owing is a specification.

This invention relates to a centrifugal paint mixing or smoothing machine wherein paint which has been previously mixed by any of the usual methods is put through a final smoothing process before it is consid ered to be in proper condition to'apply.

Heretofore the final process of mixing, or as herein called smoothing process, has been a slow and time wasting operation, being done by hand until, in the judgment of the mixer, the paint was in condition for a still further process of screening or straining, which was necessary before it was considered in fit condition to be used.

The hand process was not only a slow and ineflicient one but the screening or straining operation was somewhat detrimental to the consistency of the paint and incurred unnecessary waste.

Necessarily paint of a certain consistency during the initial mixing thereof lost some of its body during the screening or straining process, and, too, the small unbroken particles of pigment or coloring matter which could not pass through the strainer. was cast aside as waste.

It is an object of the present invention to make use of an old and well known form of centrifugal machine to which certain improvements have been applied which in themselves are simple, of comparatively low expense and readily applied tomachines of this type already in existence and yet function perfectly for the results desired.

It is a further object of the invention to arran for a continuous flow of partially mixer paint to the machine whereby the services of an attendant may to great extent be dispensed with.

Another object of the invention is to provide means to thoroughly break up, mesh or disintegrate the previously unbroken particles of pigment or coloring matter of the paint in such manner that a smoother prodnot is obtained and waste greatly and in fact almost wholly, eliminated. From the foregoing it will be readily seen that the invention consists of means to admit of a conof pigment orcoloring matter that had defied the previous mixing process.

The invention further consists in certain novel features of construction and arrangement of parts which will be fully understood from a descri tion of the drawings and the claims hereina er given. 3

Of the drawings: Figure 1 represents in vertical section one type of centrifu al machine with the improvements adde thereto.

Figure 2 is a top plan of the machine partially broken away.

Figure 3 a top plan view of a fragment of the disinte rating device partially broken away and shown on an enlar ed scale.

Figure 42 a section on the inc 4-4 Figure 3.

Figure 5 is a section similar to Figure 4 showing a modified form of disintegrating device.

Figure 6 a section similar to Figure 5 showing the means for holding the rigid members. of the disintegrating device in spaced relation. r

Fi' 'ure 7 is a detail to be referred to.

Lie characters represent like parts throughout thesevera-l figures ofthe draweferring to the drawings: The-invention is herein shown as applied to a well known tyfieof centrifugal machine and while previou y it has been referred to in the mixing or smoothing of paint it is obvious that it may 'he used for mixtures other than paint where similar treatment would be beneficial. shown is commonly known as a separator and is especially efficientin separating oil from metal objects such as screws or metal chips and it is conveniently adapted for use in connection with the present invention.

Briefly the machine consists of a base 10 having upstanding therefrom a column 11 to which the bowl 12 is secured. Within the column 11, and resting on the base 10 is a socket 13 adapted to receive and support the non-rotatable sleeve 14 which forms an elongated bearing for the container rotating shaft 15. The said shaft may be driven by any usual or suitable means, as for instance The type of machine the worm 161011 the shaft 17 which in most instances is a flexible one and direct connected to a motor of one sort or another.

The said worm 16 meshes with and drives the worm gear 18 fast on the shaft 15. The usual springs 19 being employed to maintain the'sleeve 14 and shaft 15 yieldingly :n vertical position.

Fast on theshaftlfi is a pan or container support 20 u on which rests the container 21 hi h ha ail hub 22 i l g fa er Preferably the shaft 15 is made in two parts the upper part 23 being centrally cured with its end screw threaded in the end of part 15 which is also externally threaded to receive the nut 24 which clamps the container hub between it and the sup port 20 whereby'the container is caused to rotate with the shaft 15 and may be readily removed therefrom when occasion requires.

The part 23 extends upwardly through the container cover 25 which is preferably of wood having a reinforcing plate 26 which in this instance extendsbeyond the edge of the container for a purpose to be later on plained. When the machine is in use the covers 25 and 26 will be firmly clamped to the container 12 b a plate 27 which in turn is firmly held in place by the nut 28.

The part 23 is provided with perforations 29 which communicate with the central bore 30 of said part 23 and form outlets therefrom for the passage ofthe paint or other mixtures it is intended shall be passed through the machine.

, The'upper end of said part 23 is provided with a removable bell shaped mouth 31 which is adapted to receive aint from a source of supply through the unnel shaped end of a pipe or conduit 32.

' The conduit 32 is mounted on the bail like member 33 which is pivoted to the bowl 12 at 34 at one end thereof and its other end adapted to. be secured by the bolt 35 in such manner as to be swung aside to permit of the removal of the container 21 if desired.

Viewing Figure 1 it will be seen that the structure shown therein is such that a continuous flow of paint ma be directed to the container 21 through t e funnel 32, bell mouth 31, bore 30 and out through the perforations 29 to said container where the dis osal thereof will be later on referred to.

r will be observed that the covers 25 and 26 extend beyond the edge of the container 21, the cover 25 only slightly. while the cover 26 extends an appreciable distance be- For convenience of manufacture the brush like annulus is made as before stated in four parts but for the purpose of explanation it might be made as a. single member and Lvill be herein referred to as a single mem- The preferred form shown in Figures 1 to t inclusive is composed of a back board 45 to which the groups or bunches of bristles or bristle like material are secured in any usual or well known manner; and an end confining board 4:6 to which the bristles or like material isalso secured as seen in li ure 4 of the drawings.

Kt intervals asseen in Figures 3 and 6 a group of bristles is omitted and a tube 47 is inserted through which bolts 41 pass,

the nuts 48 thereof being set up firmly secure the said boardsin s aced relation.

Some of thesaid bol s extend throu h the cover 26 to thereby secure the annu us thereto, l

The container 21 has a. series of ribs or vanes 50 adapted to impart and maintain circular motion to the paint when the machine is being driven,

At the hi h rate of speed at which. this machine is readily understood force imparted to the travel up the incline container and exert great pressure onthe covers 25 and 26, particularly adjacent the edges thereof. This pressure is reat enough to flex the covers and cause adli t opening between the cover 254 and the e go of the container 21. Through this opening the paint is forced in a thin sure being so great as to carry the paint (paint will cause it to through the groups of bristles, and any un' cut or coloring matter carried bv the through the bristles will e thoroughly torn asunder and disintegrated to the extent that the paint upon leavinig the brush is free of all lumps and partic es' of unbroken pigment wiich is not strained is actually broken up and with. y

The brush like annulus may be made in venous ways and the groups or bunches of bristles may be groups of any material suitable for the purpose.

F '1 ures 5 and 6 show a modified form of annu us which is somewhat less cost'l to make than the preferred form shown in. igure 4.. In this instance the groupsof bristles are shown as secured to one of the boards 45* only, while the end confining board 46 has upstanding annular ribs 55 the purpose of which is to keep the groups compact and offset the tendency to' bend when subjected to the pressure of the paint projected therethrough.

For the best results it is intended to use carried theredesigned to be driven it will be that the centrifugal inner wall of the therefrom. but

the form shown in Figure 4, as the groups are individually held more compact and uniform in compactness, whereby the breaking up process is bound to be more thoroughly and evenly accomplished. Preferably the film like projection of the paint strikes the brush like annulus at a point slightly removed from the backboard 4:0 and partly for this reason the cover 25 extends beyond the edge of the container 21 and is of slightly greater thickness than the back board 40. 1

This construction compels the film like stream of paint to assume an approximately horizontal plane and directs it to a point slightly below the board 40 where the density of the bristles is more uniform and best fitted for the disintegrating action on the pigment particles.

n Figure 3 is shown a novel device to be used at the junction of two quadrants, its function being to fill the gap between the series of groups of the said quadrants so that ossibility of unbroken particles passing therethrough will be eliminated.

This device is in reality a space lling partition which has a blank wall 61 facing the on-coming paint, and radially extended corrugated walls 62 adapted to par-- tially embrace and confine adjacent groups of bristles to thereby maintain the compactness thereof and incidentally retain the device in its proper position. ,The said device may be otherwise secured to the boards by means of tacks or screws through the upwardly and downwardly extending tabs It is .not known that a machine of this class has ever been used wherein a continuous flow of liquid or semi-liquid material is passed therethrough and wherein all the material was passed strained and parts thereof le t therein. It is therefore the intention to claim broadly a machine of this class wherein a continuous flow of material is supplied thereto, and wherein approximately all of said material is ejected from said machine during the operation thereof.

Having described the invention I claim:

1. In a device of the class described, a container for the material to be operated upon, adapted to be rotated at a high speed; a cover for said container normally sealing it but adapted to yield under pressure of said material in said container; means to supply material continuously to said container while in motion; and a fibrous material adjacent the mouth of said container through which said material is forcibly projected from said container, so arranged and of such character as to disintegrate lumps of said material on their forced passage through said fibrous material.

tle like materia through and not 2. In a device of the class described, a

container for the material to be operated to be rotated at a. hi h speed;

upon adapted a cover forsaid container norma y seahn it but adapted to yield under pressure 0? said material in said container; means to supply material continuously to said container while-in motion; and a ring of bristles adjacent the mouth of said container through which said material is projected from said container, so arranged as to disintegrate unbroken particles of material on their, forced passage therethrough.

3. In a device of the class described, a container for the material to be operated upon, adapted to be rotated at high speed; means to rotate said container including a shaft centrally disposed therein, a portion of said shaft being centrally bored and having outlets therefrom to said container; means to supply material to said bored shaft while in motion; and means adjacent the mouth of said container consisting of a ring of fibrous material the ends of which are held from lateral movement and between which unbroken particles of material forcibl projected from said container will be cisintegrated by and carried through said means.

4. In a device of the class described, a container for the material to be operated upon adapted to be rotated at hi h speed; a cover for said container normalfy sealing it but adapted-to be flexed under the pressure of the said material in said container; a series of groups composin a ring of bristhe ends of which are held from lateral movement and between which said material is forcibly projected from said container adjacent the mouth of said container, whereby particles of material previously unbroken will be disintegrated upon their assa e therethrough.

5. n a evice of the class described, a conical container for the material to o erated upon adapted to be rotated at a high speed; a cover for said container norinally sealing it but adapted to yield under pressure of the material in said container; a disintegrating mediiun consistin of a ring of bristles the extreme ends 0 which are held from lateral movement surrounding said container adjacent the mouth thereof, said ring being composed of two circular boards spaced apart between which the said bristles are perpendicularly arranged the endsthereof being fast with said boards between which the said material is forcibly projected; and means to effect a continuous "flow of material to said container.

Signed by me at Boston, Mass, this 12th day of April, 1922.

DONALD W. BLACK. 

